Trimmer



June 7, 1949. G. PRODROMOS ET AL 2,472,617

TRIMMER Filed Oct. 7, 1946 2 Sheets-Sheet 1 /0J" Inventor 'EECIKGE PQDKCIMDS M Prim savanna June 7, 1949. v G. PRODROMOS ET AL ,47 ,51

TRIMMER Filed Oct. 7, 1946 2 Sheets-Sheet 2 lnv mior I EI'EU EE P UDRDMQS Mn'wzu-s P UDQMEIS i ma? Patented June 7, 1949 UNITED STATES PTENT OFFICE TRIMMER George Prodromos and Marcus Prodromos, Winston Salem, N. 0.

7 Claims.

This invention relates to a sole and edge trimmer for shoes and the object of the invention is to enable the cutters to be easily and quickly removed.

Another object is to reduce to a minimum the hazards ordinarily encountered in the trimming of shoe soles.

A still further object is to establish driving connection between the guard and the trimmers so that should the guard be insecurely connected to the trimmer drive shaft, no driving power would be transmitted to the cutters.

Among its features my invention embodies an axial spindle at one end of the drive shaft of a shoe machine, said spindle forming an annular shoulder at its junction with the shaft, 2. stop collar fixed to the spindle in spaced relation to the shoulder, said stop collar having diametrically opposite longitudinal grooves in its periphery and diametrically opposite recesses in its end facing the shoulder, a cutter guard surrounding the spindle and having an enlarged stop collar receiving recess in one end, diametrically opposed lugs extending inwardly from the recessed end of the cutter guard for passage through the grooves and entrance into the recesses in the stop collar to establish driving connection between the shaft and the cutter guard, an outwardly extending guard flange on the end of the cutter guard opposite the recess, yielding means surrounding the spindle and abutting the shoulder for urging the lugs in the cutter guard into the recesses in the stop collar,

a radially toothed cutter surrounding the cutter mounted on the shaft partially overhanging the, spindle, an annular row of teeth on the overhanging end of the sleeve for meshing engagement with the teeth of the first mentioned cutter. the secondary cutter being mounted on the sleeve, an annular row of radially disposed cut-.

ting teeth on one end of the secondary cutter 2 adapted to mesh with the teeth of the first mentioned cutter and means carried by the sleeve for engaging the yielding means to advance the sleeve and the secondary cutter longitudinally of the shaft and the teeth of the cutters into meshing engagement.

Still other features include means detachably connecting the secondary cutter with the sleeve.

In the drawings,

Figure 1 is a side view of a trimmer embodying the features of this invention,

Figure 2 is anrend view of the trimmer illustrated in Figure 1,

Figure 3 is a longitudinal sectional view through the trimmer attachment,

Figure 4 is a transverse sectional view taken substantially along the line 4--4 of Figure Figure 5 is a view similar to Figure 4 showing the parts in another position,

Figure 6 is a transverse sectional view taken substantially along the line 6-5 of Figure 3,

Figure 7 is a transverse sectional view taken substantially along the line '!--1 of Figure 3,

Figure 8 is a perspective view of the sleeve upon which the secondary cutter is mounted, and

Figure 9 is a fragmentary sectional view through a drive shaft illustrating a modified form of the invention.

Referring to the drawings in detail, a drive shaft l!) is provided at one end with an axial spindle ll carrying, in spaced relation with the shoulder l2 formed at the' junction of the spindle with the drive shaft I 0, a stop collar it formed with diametrically opposite longitudinal grooves M and having in the wall which faces the shoulder diametrically opposite recesses l5 for a purpose to be more fully hereinafter explained.

Fitted over the spindle H is a cutter guard designated generally l6 which comprises a tubular guard body 11 formed at one end with an enlarged annular recess l8 for the reception of the stop collar l3 previously referred to. Extendlng outwardly from the end of the tubular body I! opposite that containing the recess I8 is an annular guard flange ill from the inner face of which, i. e. that facing the shoulder l2, project radially spaced lugs 20 the purpose of which will be more fully hereinafter explained. Projecting inwardly toward the axis of the tubular body I! at its recessed end are diametrically opposed lugs 25.

A cutterdesi nated generally 2| surrounds the 3 cutter teeth 23 of conventional form. As illustrated in Figure 3, the lugs project into the spaces between the teeth 23 in order to establish driving connection between the cutter guard l5 and the cutter 2|.

Surrounding the spindle between the inner end of the cutter and the shoulder I2 is a compression coil spring 24 which is adapted to hold the cutter projected outwardly against the flange l9, and to hold the inwardly extending radially disposed lugs 25 in the recesses l5'in order to establish driving connection between the spindle I and the cutter guard l6.

Fitted 'over the end of the shaft l0 carrying the spindle H is a sleeve 26 provided at one end with an annular row of spacedteeth 21. A.:stop shoulder 28 is formed on the sleeve 26 adjacent the end carrying the teeth 2'! and forms anabutment against which a shoulder 29 formed in the secondary cutter 3|} is adapted to engage when the cutter is in positionon the sleeve. As illustrated in Figure 1, the cutter 30 is provided-at one end with a plurality .ofspaced cutter teeth 3| which are adapted to mesh with "the cutter teeth 23.inorder.to eifectdriving :connection :between the cutters.

Mounted for longitudinal .sliding movement within the sleeve .26, in .=circumferentially spaced longitudinally extending slots :32, :18 a stop ring 33 which as illustrated in Flgure'fi is disposed between the end .of the spring :24 and the inner ends of the cutter guard 16 and the cutter 2| to hold the spring in .place when the cutter and cutter guard are removed fromithe spindle Opening into the :endof the :sleeve 26 opposite that carrying the teeth 'lfltarezdiametrically opposite openings 34 :provided :with perpendicular circumferential grooves 35 the "bottom walls of which form cam surfaces :36 forfa zpurpose 'to be more fully hereinafterzexplained. .A stop collari3'l is fitted over the slotted vendlof :the .sleeve :26 for engagement with "the cutter -I3||to hold the latter againstthe stop28 "and formedf-inithe stop collar 31 is an annular recess or :chamber .38 :in-which latch-dogs 39-arecoperable. .Asdllnstrated'in Figure 4,'these latch-dogs are pivoted as :at "40 to the 'stop collar 31 toiswing about exes paralleliwith the longitudinal axis .of the sleeve :26 and carry at their free ends inwardlyprojectingtongues 4| of a width easily to bereceivedinthe openings34. A cam-ring lzfiistrotatably supportedvin :the recess 38, and fixed=tothezface of :the :ca-mring 42 facing the 1atch-'-d0gs"36:ar.e cams 43,which in oneposition of the ring :42 areadapted to project the ends4l of-the latch dogswithrou'g'h the'openings 34 :as'illustrated in Figure 5,581141 in 'anotherposition are adaptedvto permit fthe latch-dogs 'toride the cam faces r36'ofathe grooves 35 onto the outer surface of the sleeve 26 as illustrated in Figure-.4. It will thus :be :seen that svlth the parts 'inthis position the :stop collar .31 "will be :free to move longitudinally of the sleeve :26 in order to permit the *cutter 30 to be removed vtherefrom. *When the'tongues 4| are projecteddnto the-openings 34, however, the'stop -collar=will beheld against longitudinaltmovementl'on thesleeve 226.

"In the modified :form' :of device illustrated :in Figure 9, the drive shaft l-lfla- :is equipped *with an internally screw-"threaded axial bore it 0b and a: spindle "designatedr generally ,|.b.'is 'provided like the spindle with a stop .coll-ar 317 :having .adiametricallyspacedmotchesfl bsintermediate which are located longitudinally extending diametrically opposed peripheral--;.grooves 44b. For-med ontheaend of thespindle :l; [b11981 :threadecl exten- 4 sion Ila which is adapted to be threaded into the threaded bore |0b of the shaft |0a as illustrated in the drawings.

Surrounding the shaft |0 adjacent the stop collar 31 and in abutting relation with the sleeve 26 is a longitudinally slidable collar 44 urged by a spring 45 into engagement with the sleeve, and fixed to the shaft in spaced relation to the shoulder 2 is a stop collar 46 against which the spring 45 abuts as will .be readily understood upon reference to the drawings;

In use, it will be understood that the cutter 2| is first slipped over the cylindrical portion |'l *of:.the cutter guard IS with the spring 24 in place over the spindle The cutter guard is then slipped over the-free end of the spindle with the lugs 25 passing through the slots M in the stop :collar 43 and the lugs 21 on the sleeve 26 entering the spaces between the teeth of the cutter positively to establish driving connection between the cutter and the sleeve. Such movement compresses the spring 24 against theshoulder 2 and upon rotating the cutterguard I 6 it will be obvious that the lugs 25 will be engaged in the recesses l5 of the collar |3 in order to effect driving connection between the shaft and the cutter guard. The bosses 26 projecting between the teeth '23 of the cutter 2| will establish-driving connection betweenthe cutter and the cutter guard so that the cutter will rotate in unison with the shaft .IO, The pressure of thespring 24 against the end of the cutter guardand cutter will hold the parts in driving-relation until such time as it is necessary to replace the cutter, when pressure is applied on the outer end of the cutter guard 16 to force-the lugs 25 out of the recesses 24, and upon rotating the cutter guard and cutter it will be obvious that the lugs'25 may be made to align with the slots M in the stop collar If! so as to permit the cutter guard and cutter to be removed from the end of the spindle. Obviously, with the removal of thecutter 2| and cutter guard l6, the sleeve 26 and the cutter 30 will be free to be slipped ofi of the end of the shaft |0 over the spindle II. In order to change the cutter 30- it is necessary to rotatethe cam ring 42 to move the cams 43 away from the dogs 39 and then to rotate the stop collar 31 to cause the dogs '39'to ride up the inclined faces 36 of the grooves '35. With the parts in this position the stop collar 31 may be slipped off of the end of the sleeve '26 to free the cutter 30. A new and sharpened cutter may then be replaced and the stop collar 31 positioned on the sleeve adjacent the cutter 30 and pushed'home, rotating to align Y the tongues 4| with the openings 34 and locked without departing from the spirit and scope of the invention as claimed.

We claim:

1. A trimmer comprising a-shaft, an axialspindle on one end of the shaft "forming an annular shoulder at'its junction with the shaft, a stop collar fixed to the spindle in spaced relation to the shoulder, said stop collar having-diametrically opposite longitudinal grooves 'inits periphery and diametrically opposite recesses in its end facing the shoulder, a cutter guard surrounding the spindle and having an enlarged stop collar receiving recess in one end, diametrically opposed lugs extending inwardly from the recessed end of the cutter guard for passage through the grooves and entrance into the recesses to establish driving connection between the shaft and the cutter guard, an outwardly extending annular guard flange on the end of the cutter guard opposite the recess, yielding means surrounding the spindle and abutting the shoulder for urging the lugs on the cutter guard into the recesses in the stop collar, a radially toothed cutter surrounding the cutter guard between the guard flange and the yielding means and an annular row of circumferentially spaced lugs on the guard flange for entering the spaces between the teeth on the cutter and effecting driving connection between the cutter and the cutter guard.

2. A trimmer comprising a shaft, an axial spindle on one end of the shaft forming an annular shoulder at its junction with the shaft, a stop collar fixed to the spindle in spaced relation to the shoulder, said stop collar having diametrically opposite longitudinal grooves in its periphery and diametrically opposite recesses in its end facing the shoulder, a cutter guard surrounding the spindle and having an enlarged stop collar receiving recess in one end, diametrically opposed lugs extending inwardly from the recessed end of the cutter guard for passage through the grooves and entrance into the recesses to establish driving connection between the shaft and the cutter guard, an outwardly extending annular guard flange on the end of the cutter guard opposite the recess, yielding means surrounding the spindle and abutting the shoulder for urging the lugs on the cutter guard into the recesses in the stop collar, a radially toothed cutter surrounding the cutter guard between the guard flange, the yielding means and an annular row of circumferentially spaced lugs on the guard flange for entering the spaces between the teeth on the cutter and effecting driving connection between the cutter and the cutter guard, a radially toothed secondary cutter surrounding the portion of the spindle between the stop collar and the shoulder and means yieldingly to hold the secondary cutter advanced toward the first mentioned cutter with the teeth of both cutters in meshing engagement.

3. A trimmer comprising a shaft, an axial spindle on one end of the shaft forming an annular shoulder at its junction with the shaft, a stop collar fixed to the spindle in spaced relation to the shoulder, said stop collar having diametrically opposite longitudinal grooves in its periphery and diametrically opposite recesses in its end facing the shoulder, a cutter guard surrounding the spindle and having an enlarged stop collar receiving recess in one end, d-iametrically opposed lugs extending inwardly from the recessed end of the cutter guard for passage through the grooves and entrance into the recesses to establish driving connection between the shaft and the cutter guard, an outwardly extending annular guard flange on the end of the cutter guard opposite the recess, yielding means surrounding the spindle and abutting the shoulder for urging the lugs on the cutter guard into the recesses in the stop collar, a radially toothed cutter surrounding the cutter guard between the guard flange and the yielding means, an annular row of circumferentially spaced lugs on the guard flange for entering the spaces between the teeth on the cutter and effecting driving connection between the cutter and the cutter guard, a sleeve slidably mounted on the shaft partially to overhang the spindle, an annular row of teeth on the overhanging end of the sleeve for meshing engagement with the teeth of the first mentioned cutter, a secondary cutter mounted on the sleeve, an annular row of radially disposed cutting teeth on one end of the secondary cutter adapted to mesh with the teeth of the first mentioned cutter, means carried by the sleeve for engaging the yielding means to advance the sleeve and the secondary cutter longitudinally of the shaft and the teeth of the sleeve and the secondary cutter into meshing engagement with the teeth of the first mentioned cutter.

4. A trimmer comprising a shaft, an axial spindle on one end of the shaft forming an annular shoulder at its junction with the shaft, a stop collar fixed to the spindle in spaced relation to the shoulder, said stop collar having diametrically opposite longitudinal grooves in its periphery and diametrically opposite recesses in its end facing the shoulder, a cutter guard surrounding the spindle and having an enlarged stop collar receiving recess in one end, diametrically opposed lugs extend-ing inwardly from the recessed end of the cutter guard for passage through the grooves and entrance into the recesses to establish driving connection between the shaft and the cutter guard, an outwardly extending annular guard flange on the end of the cutter guard opposite the recess, yielding'means surrounding the spindle and abutting the shoulder for urging the lugs on the cutter guard into the recesses in the stop collar, a radially toothed cutter surrounding the cutter guard between the guard flange and the yielding means, an annular row of circumferentially spaced lugs on the guard flange for entering the spaces between the teeth on the cutter and effecting driving connection between the cutter and the cutter guard, a sleeve slidably mounted on the shaft partially to overhang the spindle, an annular row of teeth on the overhanging end of the sleeve for meshing engagement with the teeth of the first mentioned cutter, a secondary cutter mounted on the sleeve, an annular row of radially disposed cutting teeth on one end of the secondary cutter adapted to mesh with the teeth of the first mentioner cutter, means carried by the sleeve for engaging the yielding means to advance the sleeve and the secondary cutter longitudinally of the shaft and the teeth of the sleeve and the secondary cutter into meshing engagement with the teeth of the first mentioned cutter, and a stop at the toothed end of the sleeve to limit the advance of th secondary cutter toward the toothed end of the sleeve.

5. A trimmer comprising a shaft, an axial spindle on one end of the shaft forming an annular shoulder at its junction with the shaft,

a stop collar fixed to the spindle in spaced rela-- tion to the shoulder, said stop collar having diametrically opposite longitudinal grooves in its periphery and diametrically opposite recesses in its end facing the shoulder, a cutter guard surrounding the spindle and having an enlarged stop collar receiving recess in one end, diametrically opposed lugs extending inwardly from the recessed end of the cutter guard for passage through the grooves and entrance into the recesses to establish driving connection between the shaft and the cutter guard, an outwardly extending annular guard flange on the end of the cutter www on. t the: cutter; and effecting driving t connection betweenthecutter; and: the cutter guard; a sleeve J slidably mounted-i on the shaft partially to .overhang;thespind1e;. an annular row of teethon the overhanging end; 01%.: the ::sleeve; for meshingy en'vgagementwithtthea-teeth ;.of;;the first 'mentionedw cutter, a secondary cutter. mounted von. the sleeve; an annular row of radially disposed cutting teeth 1 on. one end .ofntheesecondary cutter adapted ,to mesh with the teeth of the first mentioned cutter,

means carried by; the-- sleeve for engaging the yielding, means to-Aadvancethe sleeve and the secondary cutterglongitudinally of the shaft and the teeth of the sleeveandthe secondary cutter into .meshing engagement with. the teeth of the firstmentioned cutter, a'stoprat the toothed end ot the sleeve to limit the'advance ofthe secondary cutter'towardthe toothed :-end of the-sleeve, and means carried-loythe sleeve to'hold the secondary cutter advanced toward, the stop.

6. A. trimmer: comprising; a shaft, an axial spindle on one, endmr'the shaft forming an annular shoulder at its junction with the shaft, a stop, COHBI'fiXEdI'tO the spindle in spaced relation to =theeshoulder; said step collar having diametrically opposite-longitudinal grooves in its periphery and-diametrically opposite recesses in itsendsfacing the shoulder. a:-cutter;guard surrounding'rthespind-le and having an enlarged stop collarreceiving recess in .one. end, diametrically opposedslugs;extendin inwardly from the recessediend of the cutter guard for passage through the-grooves and-entrance into the recesses to establish drivingconnectiorr between the shaft and-the cutter guard, an outwardly extending annular guard.-fiangeton-.-the endof the cutter guard opposite the .recess, ,yielding means surroundingthe spindle .andaabutting the shoulder forurging the lugstonthemutter guard into the recesses in the stop collar, a. radially toothed' cutter surrounding the acutter guard between the guard flange andttheryielding'means, an annular row'ofcircumferentiallyspaced lugs on the guard flange for entering the spaces between. the teeth on .thecutter and effecting-driving connection. between .thescut-ter, and the; cutter: guard; a sleeve slidably, mounted on the shaft partially to overhang-the spindle,-.an annulanrow ofteeth on the overhang-inggr-end" ofethe sleevez for meshing engagement-withrthe teethof-the first mentioned cutter, a secondary cutter mounted onthesleeve,

an. annular row-of radially disposed cutting teeth on one end lot the secondarycutter adapted to mesh-with;the teetheof the first mentioned cutter, means carried by the. sleeve. for engaging, the,- yieldingh means-etc. advance: the sleeve and the:

8? secondaryz'cutter; longitudinallyuofisthe shaitzandd the steethrofcthe sleevearandcthessecondary cutter: into Vmeshingztengagementtwitlrzthe :teeth of: the-:- first*mentioneducuttet;"arstoniatrthertoothedsendi of 'thesleeve torlimitlthe adyancerofthe'secondarys cutter toward-the: toothedgend: otthetsleeveiandll azstopcollandetachably.connectedzfwitlt the sleevez to;hold the secondarymutter against the stop.;.

'7'. A trimmencompnisingra; shaft; arr axial spine ;d1e onone end of ttheishaft forming :an annular? shoulder at itstjunctionzwith the shaft,z.asstopri collar r fixed -tosthe.-spindlezinx spacedgrelatiom to) the shoulden saidl stopzcollarzhaving diametrical-i 1y opposite longitudinal agroovesz-in-zits :peripherya ,and. diametrically; oppositerecesses in" its end-i.

facing the'shoulder, a cutterguardsurrounding: the spindle and having an-r-enlarged stop collar: receiving a recess: in; one end; diametricallyeope posed lugs extending inwardly fromrthewrecessedo end-of the cutter guard for passage -through the the yielding means; an i annular i'row of t cirrcumw ferentiallyspaced rlugs omtheeguardrflange --fonr entering theuspaces between-the. teeth onnthec cutter and efiecting driving connection betweenri the cutter and. the cutteiuguard a. sleeverslidablyr mounted on the-shaft partially; to overhang the? spindle an annularrow of teeth :onnthe overs hangin end -,of "the sleeveeforzmeshing:iengagc-e ment with the teeth of the first mentionedcutterr. a secondary-cutter mounted. on. the sleeve;- am ane nular: row a of radially; disposedtcutting; teethn our:

onesendsof-lthe second-arygcutteradaptedtitdmeshn with the, teeth. of: the: first ,mentioned 1 cutterr, means carried. by -thessleeve for engaging; the: yielding means v-to; advance: the sleeves: and. the: secondaryvcutter longitudinally of the shaft land-.2 the; teeth .oftthe .sleeve--and ,-thesecondary.- cutter-r into meshing engagement with the teeth: 0t the-1' firsttmentionedt. cutter; a: stop. at the toothed; end .of the sleeve-to limit the advance of the-seer ondary, cutter toward. the. toothed end of the! sleeve, said sleeve havingaa pair ofdiametrically opposed. slots-opening thereintma-camgroove!- in :the' periphery of the sleeve at athe-inner endlof-r' each. slot, astop collar adapted to be fitted over I the; sleeve tov engagetthe secondary 'cutter and".

hold it advanced against-the stop and dogscare' ried by the-stop collar for entrance into the slots; and. t engagement vwith the cam grooves. to: lock: theustopflcollar against the secondary-cutter; GEORGE'PRODROMOS. MARCUS PRODROMOS;

No references cited. 

